Deep purifying method for manganese sulfate solution

A manganese sulfate solution, deep purification technology, applied in photography technology, instruments, photography auxiliary technology and other directions, can solve the problems of filtration, heavy washing burden, complex ACM production process, waste water and other problems, to achieve low cost, no environmental pollution, The effect of simple process

Inactive Publication Date: 2004-06-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that not only the production process of ACM is complicated, but also requires special equipment, and a large amount of waste liquid needs to be treated during the preparation process.
Moreover, the amount added during adsorption is as high as 100g / L or more, and the burden of filtration and washing is heavy
And the used adsorbent needs to be desorbed and regenerated by sulfuric acid, which will generate waste water
Therefore, this artificially presynthesized manganese compound has its limitations as an adsorption and impurity removal process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1. 10L of manganese sulfate solution containing MnSO 4 150g / L, potassium 500ppm, molybdenum 0.5ppm, cobalt 0.1g / L, nickel 0.1g / L, iron 0.4g / L, copper 0.06g / L, pH 4.0. Under the conditions of a stirring speed of 150 rpm and a temperature of 80° C., slowly add 200 mL of a sodium permanganate solution with a concentration of 100 g / L, stop stirring after 30 minutes, keep the temperature for 2 hours, and filter. The concentration of impurity ions in the purified solution is 80 ppm potassium, 0.02 ppm molybdenum, 3 ppm cobalt, 5 ppm nickel, 2 ppm iron, and 3 ppm copper.

Embodiment 2

[0016] Example 2. 10L of manganese sulfate solution containing MnSO 4 150g / L, potassium 500ppm, molybdenum 0.5ppm, cobalt 0.1g / L, nickel 0.1g / L, iron 1g / L, copper 0.05g / L, pH 4.5. Under the conditions of a stirring speed of 150 rpm and a temperature of 10°C, 50 mL of a 30% hydrogen peroxide solution was slowly added, and stirring was stopped after 30 minutes, and the temperature was kept for 4 hours, and then filtered. The concentration of impurity ions in the purified solution is 85 ppm potassium, 0.02 ppm molybdenum, 4 ppm cobalt, 4 ppm nickel, 1.5 ppm iron, and 2 ppm copper.

Embodiment 3

[0017] Example 3. 10L of manganese sulfate solution containing MnSO 4 50g / L, potassium 200ppm, molybdenum 0.4ppm, iron 1g / L, pH 1.5. Under the condition of a temperature of 40° C., slowly add 200 mL of 10% NaClO solution, then stir evenly and stand for 2 hours to react, and then filter. The concentration of impurity ions in the purified solution is 82ppm for potassium, 0.02ppm for molybdenum, and 1.5ppm for iron.

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PUM

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Abstract

The present invention belongs to extraction of nonferrous metal, and it is a method for deep removing impurities of elements of K, Mo, Fe, Co, Ni and Cu, etc. from manganese sulfate solution. It is characterized by that the precipitant or reagent can be added into the manganese sulfate solution to form precipitating agent in the solution to remove the impurities from solution. The EMD extracted by said method not only can meet the requirements for producing functional cell, but also its process is simple and cost is low.

Description

Technical field: [0001] The invention belongs to the purification of metal solutions, in particular to the deep purification of manganese sulfate solutions for preparing electrolytic manganese dioxide. Background technique: [0002] The raw materials for the production of electrolytic manganese dioxide (EMD) are generally rhodochrosite, pyrolusite, hard manganese ore, etc., and manganese sulfate solution is obtained through sulfuric acid leaching. It contains impurity elements such as potassium, iron, cobalt, nickel, and molybdenum. It will enter the product EMD during the electrolysis process. The mercury-free alkaline zinc-manganese battery is very sensitive to the impurity elements in the EMD used: when the potassium content is too high, it will affect the crystal form, specific gravity and discharge performance of the EMD; heavy metals such as copper will cause the battery to short circuit; iron, molybdenum and other elements will cause The battery climbs alkali. In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C25C1/10
Inventor 赵中伟李洪桂霍广生孙培梅李运姣孙召明
Owner CENT SOUTH UNIV
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